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