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