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