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)(18,19)(23,25)(24,26)(30,31) involution — undirected(2,4)(3,10)(8,12)(11,13)(17,18,22,19)(20,25,27,23)(21,24,29,26)(28,31,32,30)(33,34)(35,40)(36,37)(38,39)(41,45)(42,46)(43,48)(44,47)(2,4)(7,9)(8,12)(15,16)(20,27)(23,25)(28,32)(30,31)(34,39)(36,45)(40,47)(42,48) involution — undirected(1,3,6,10)(2,7,4,9)(5,13,14,11)(8,16,12,15)(17,19,22,18)(20,25,27,23)(21,24,29,26)(28,30,32,31)(33,35)(34,40)(36,42)(37,46)(38,44)(39,47)(41,43)(45,48)(1,4,6,2)(3,9,10,7)(5,12,14,8)(11,16,13,15)(17,20,22,27)(18,23,19,25)(21,28,29,32)(24,30,26,31)(33,36)(34,41)(35,42)(37,39)(38,45)(40,43)(44,48)(46,47)(1,5,6,14)(2,8,4,12)(3,11,10,13)(7,15,9,16)(17,21)(18,24)(19,26)(20,28)(22,29)(23,30)(25,31)(27,32)(33,37,38,41)(34,36,39,45)(35,43,44,46)(40,48,47,42)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.