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