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