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