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