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