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