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