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