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