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