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