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