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