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