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