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