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