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)(18,23)(19,26)(21,29)(27,31)(33,34,38,36)(35,39,41,42)(37,40,46,44)(43,47,45,48)(2,7)(4,9)(8,15)(12,13)(17,18,22,23)(19,24,26,30)(20,21,25,29)(27,28,31,32)(35,41)(39,42)(43,45)(47,48)(17,19,22,26)(18,24,23,30)(20,27,25,31)(21,28,29,32)(33,35)(34,39)(36,42)(37,43)(38,41)(40,47)(44,48)(45,46)(1,3)(2,4)(5,10)(6,11)(7,9)(8,12)(13,15)(14,16)(17,19)(18,24)(20,27)(21,28)(22,26)(23,30)(25,31)(29,32)(33,36,38,34)(35,42,41,39)(37,44,46,40)(43,48,45,47)(1,4)(2,3)(5,13)(6,9)(7,11)(8,16)(10,15)(12,14)(17,20)(18,21)(19,27)(22,25)(23,29)(24,28)(26,31)(30,32)(33,35)(34,39)(36,42)(37,45)(38,41)(40,48)(43,46)(44,47) involution — undirected(1,5,6,14)(2,8,7,15)(3,10,11,16)(4,12,9,13)(17,21)(18,25)(19,28)(20,23)(22,29)(24,31)(26,32)(27,30)(33,37)(34,40)(35,43)(36,44)(38,46)(39,47)(41,45)(42,48)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.