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