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