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