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)(13,16)(17,18,23,25,22,20,21,30)(19,26,28,32,29,24,27,31)(1,2,4,6,5,8,12,14)(3,7,10,13,11,15,9,16)(17,19,23,27,22,29,21,28)(18,24,30,31,20,26,25,32)(1,3)(2,7)(4,10)(5,11)(6,13)(8,15)(9,12)(14,16)(17,20)(18,22)(19,26)(21,30)(23,25)(24,29)(27,32)(28,31) involution — undirected(2,8)(6,14)(7,15)(13,16)(17,21,22,23)(18,25,20,30)(19,27,29,28)(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.