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