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