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