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