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