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