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