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