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