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