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