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