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