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