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