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