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