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