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