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