One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,8)(3,5,4,9)(6,14,15,10)(11,16,12,13)(17,18)(19,25)(20,28)(21,24)(22,26)(23,29)(27,30)(31,32)(34,38)(36,43)(39,44)(42,47)(1,3)(2,5)(4,7)(6,11)(8,9)(10,13)(12,15)(14,16)(17,18,21,24)(19,22,26,25)(20,23,29,28)(27,30,32,31)(35,41)(39,44)(42,47)(46,48)(2,8)(3,4)(10,14)(11,12)(19,26)(22,25)(27,32)(30,31)(33,34)(35,39)(36,40)(37,38)(41,44)(42,46)(43,45)(47,48) involution — undirected(1,4,7,3)(2,9,8,5)(6,12,15,11)(10,16,14,13)(17,19,21,26)(18,22,24,25)(20,27,29,32)(23,30,28,31)(33,35,37,41)(34,39,38,44)(36,42,43,47)(40,46,45,48)(1,5,7,9)(2,3,8,4)(6,13,15,16)(10,11,14,12)(17,18)(19,22)(20,23)(21,24)(25,26)(27,30)(28,29)(31,32)(33,36,37,43)(34,40,38,45)(35,42,41,47)(39,46,44,48)(1,6,7,15)(2,10,8,14)(3,11,4,12)(5,13,9,16)(17,20,21,29)(18,23,24,28)(19,27,26,32)(22,30,25,31)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.