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