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