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