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