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