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