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