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