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