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