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