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