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