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