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