One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6,10,14)(7,11,16,20)(8,13,9,18)(12,17,19,15)(21,22,26,29)(23,27,32,36)(24,28,25,30)(31,34,33,35)(1,2)(3,4)(5,7)(6,11)(8,17)(9,15)(10,16)(12,18)(13,19)(14,20)(21,23)(22,27)(24,33)(25,31)(26,32)(28,35)(29,36)(30,34) involution — undirected(1,3,4,2)(5,7)(6,12)(8,15)(9,17)(10,16)(11,18)(13,20)(14,19)(22,28)(23,31)(24,25)(29,30)(32,33)(34,35)(5,8,10,9)(6,13,14,18)(7,15,16,17)(11,12,20,19)(22,29)(23,32)(28,30)(31,33)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.