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