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