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