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