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