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