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