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