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