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