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