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