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