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