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