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