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