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