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