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