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