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