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