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