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