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