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