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