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