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