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