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