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