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