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