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