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