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