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