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