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