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