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