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