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