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