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