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