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