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