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