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)(20,32)(21,27)(22,26)(23,36)(24,30)(25,33)(29,44)(31,40)(34,42)(35,39)(37,41)(38,46)(43,47)(45,48)(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,19)(18,24)(20,29)(21,35)(22,30)(23,31)(25,38)(26,28)(27,40)(32,48)(33,47)(34,45)(36,39)(37,46)(41,43)(42,44) involution — undirected(3,8)(5,7)(10,13)(14,16)(17,20,22,34)(18,25,26,41)(19,29,30,45)(21,33,23,37)(24,38,28,43)(27,42,36,32)(31,46,35,47)(39,48,40,44)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(18,26)(19,30)(25,41)(27,36)(29,45)(31,35)(32,42)(46,47)(10,13)(14,16)(17,21,22,23)(18,27,26,36)(19,31,30,35)(20,33,34,37)(24,39,28,40)(25,42,41,32)(29,46,45,47)(38,48,43,44)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.