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