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