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