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