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