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