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