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