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