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