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