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