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