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