One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,12)(6,7)(8,10)(9,14)(11,15)(13,16)(17,18)(19,25)(20,28)(21,22)(23,27)(24,29)(26,30)(31,32)(33,34)(35,37)(36,44)(38,39)(40,43)(41,45)(42,47)(46,48) involution — undirected(2,7)(5,8)(9,12)(13,15)(17,18)(19,23)(20,28)(21,22)(24,29)(25,27)(26,31)(30,32)(34,39)(36,45)(37,40)(42,48) involution — undirected(2,7)(3,10)(9,12)(11,16)(18,22)(23,25)(24,28)(30,31)(33,35,38,43)(34,37,39,40)(36,42,45,48)(41,46,44,47)(1,3,6,10)(2,8,7,5)(4,11,14,16)(9,15,12,13)(17,18)(19,23)(20,24)(21,22)(25,27)(26,30)(28,29)(31,32)(33,35)(34,40)(36,42)(37,39)(38,43)(41,47)(44,46)(45,48)(1,4)(2,9)(3,11)(5,13)(6,14)(7,12)(8,15)(10,16)(17,19,21,27)(18,23,22,25)(20,26,29,32)(24,30,28,31)(33,36,38,45)(34,41,39,44)(35,42,43,48)(37,46,40,47)(1,5,6,8)(2,10,7,3)(4,13,14,15)(9,16,12,11)(17,20)(18,24)(19,26)(21,29)(22,28)(23,30)(25,31)(27,32)(33,37,38,40)(34,35,39,43)(36,46,45,47)(41,42,44,48)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.