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