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)(13,14,17,19)(15,20,18,16)(5,7)(6,8)(9,11)(10,12)(13,14)(15,20)(16,18)(17,19)(21,22,25,24)(23,27,28,26)(1,2)(3,4)(13,15,17,18)(14,16,19,20)(21,23,25,28)(22,26,24,27)(5,7)(6,10)(8,12)(9,11)(13,14)(15,16)(17,19)(18,20) involution — undirected(1,2)(3,4)(5,8,9,10)(6,11,12,7)(13,16)(14,18)(15,19)(17,20)(21,24,25,22)(23,27,28,26)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.