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