One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,11)(5,9)(6,7)(10,15)(12,16)(13,14)(17,18)(19,25)(20,28)(21,24)(22,27)(23,29)(26,30)(31,32)(33,34)(35,42)(36,44)(37,40)(38,39)(41,46)(43,47)(45,48) involution — undirected(2,7)(4,8)(5,13)(10,16)(17,18)(19,22)(20,28)(21,24)(23,29)(25,27)(26,31)(30,32)(34,38)(40,42)(41,44)(47,48) involution — undirected(1,3,6,11)(2,8,7,4)(5,10,13,16)(9,15,14,12)(17,18,21,24)(19,22,27,25)(20,23,29,28)(26,30,32,31)(33,35,39,37)(34,40,38,42)(36,45,46,43)(41,48,44,47)(1,3)(2,4)(5,10)(6,11)(7,8)(9,12)(13,16)(14,15)(17,18)(19,22)(20,23)(21,24)(25,27)(26,30)(28,29)(31,32)(33,36,39,46)(34,41,38,44)(35,43,37,45)(40,47,42,48)(1,4)(2,3)(5,12)(6,8)(7,11)(9,10)(13,15)(14,16)(17,19,21,27)(18,22,24,25)(20,26,29,32)(23,30,28,31)(33,37,39,35)(34,42,38,40)(36,45,46,43)(41,48,44,47)(1,5,6,13)(2,9,7,14)(3,10,11,16)(4,12,8,15)(17,20)(18,23)(19,26)(21,29)(22,30)(24,28)(25,31)(27,32)(33,38,39,34)(35,42,37,40)(36,44,46,41)(43,48,45,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.