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