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