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