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