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