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