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