One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(9,10,13,12)(11,15,16,14)(17,18,22,21)(19,25,27,23)(20,24,28,29)(26,31,32,30)(9,11,13,16)(10,14,12,15)(17,19)(18,23)(20,26)(21,25)(22,27)(24,30)(28,32)(29,31)(1,2,4,6)(3,5,7,8)(9,12,13,10)(11,15,16,14)(17,19,22,27)(18,23,21,25)(20,26,28,32)(24,30,29,31)(1,2)(3,5)(4,6)(7,8)(17,19)(18,23)(20,26)(21,25)(22,27)(24,30)(28,32)(29,31) involution — undirected(1,3,4,7)(2,5,6,8)(17,20)(18,24)(19,26)(21,29)(22,28)(23,30)(25,31)(27,32)(17,21,22,18)(19,25,27,23)(20,24,28,29)(26,30,32,31)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.