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