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