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)(11,15)(12,14)(13,16)(17,18,21,25)(19,27,29,23)(20,31,33,24)(22,26,34,39)(28,36,44,41)(30,42,45,37)(32,40,35,38)(43,47,46,48)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(20,32)(22,34)(24,38)(26,39)(28,43)(30,45)(31,40)(33,35)(36,47)(37,42)(41,48)(44,46) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,19)(18,23)(20,28)(21,29)(22,30)(24,36)(25,27)(26,37)(31,41)(32,43)(33,44)(34,45)(35,46)(38,47)(39,42)(40,48)(1,3,5,4)(2,7,6,8)(10,14)(13,15)(17,20,21,33)(18,24,25,31)(19,28,29,44)(22,35,34,32)(23,36,27,41)(26,40,39,38)(30,46,45,43)(37,48,42,47)(1,4,5,3)(2,7,6,8)(10,14)(13,15)(19,29)(23,27)(28,44)(30,45)(36,41)(37,42)(43,46)(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.