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