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