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