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