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