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