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