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