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