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